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| author | Marc Zyngier <marc.zyngier@arm.com> | 2015-10-02 16:43:06 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-10-16 15:07:16 +0300 |
| commit | 54fa97eeb9e22b47d68b67ee00987afa7fbc2178 (patch) | |
| tree | bf5cbab9a60df9291dcc92592f21a1c52cc593ee /include | |
| parent | 098259eb16675a83e1d6ea31e06dc3ec152810a2 (diff) | |
| download | linux-54fa97eeb9e22b47d68b67ee00987afa7fbc2178.tar.xz | |
PCI/MSI: Allow the MSI domain to be device-specific
So far, we've always considered that for a given PCI device, its
MSI controller was either set by the architecture-specific
pcibios hook, or simply inherited from the host bridge.
This doesn't cover things like firmware-defined topologies like
msi-map (DT) or IORT (ACPI), which can provide information about
which MSI controller to use on a per-device basis.
This patch adds the necessary hook into the MSI code to allow this
feature, and provides the msi-map functionnality as a first
implementation.
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/msi.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 87723751054d..0b4460374020 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -295,6 +295,12 @@ irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev, int pci_msi_domain_check_cap(struct irq_domain *domain, struct msi_domain_info *info, struct device *dev); u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev); +struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev); +#else +static inline struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev) +{ + return NULL; +} #endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */ #endif /* LINUX_MSI_H */ |